From 1fe684e349e904adeed2883cfdeef259a21c94f4 Mon Sep 17 00:00:00 2001 From: Peter Zijlstra Date: Thu, 21 May 2015 10:57:36 +0200 Subject: [PATCH] perf/x86/intel: Remove pointless tests Both intel_commit_scheduling() and intel_get_excl_contraints() test for cntr < 0. The only way that can happen (aside from a bug) is through validate_event(), however that is already captured by the cpuc->is_fake test. So remove these test and simplify the code. Signed-off-by: Peter Zijlstra (Intel) Cc: Linus Torvalds Cc: Peter Zijlstra Cc: Stephane Eranian Cc: Thomas Gleixner Cc: Vince Weaver Signed-off-by: Ingo Molnar --- arch/x86/kernel/cpu/perf_event_intel.c | 14 ++++---------- 1 file changed, 4 insertions(+), 10 deletions(-) diff --git a/arch/x86/kernel/cpu/perf_event_intel.c b/arch/x86/kernel/cpu/perf_event_intel.c index ff56fc3..6a3e794 100644 --- a/arch/x86/kernel/cpu/perf_event_intel.c +++ b/arch/x86/kernel/cpu/perf_event_intel.c @@ -1954,12 +1954,10 @@ static void intel_commit_scheduling(struct cpu_hw_events *cpuc, int idx, int cnt lockdep_assert_held(&excl_cntrs->lock); - if (cntr >= 0) { - if (c->flags & PERF_X86_EVENT_EXCL) - xl->init_state[cntr] = INTEL_EXCL_EXCLUSIVE; - else - xl->init_state[cntr] = INTEL_EXCL_SHARED; - } + if (c->flags & PERF_X86_EVENT_EXCL) + xl->init_state[cntr] = INTEL_EXCL_EXCLUSIVE; + else + xl->init_state[cntr] = INTEL_EXCL_SHARED; } static void @@ -2027,10 +2025,6 @@ intel_get_excl_constraints(struct cpu_hw_events *cpuc, struct perf_event *event, if (!(c->flags & PERF_X86_EVENT_DYNAMIC)) { struct event_constraint *cx; - /* sanity check */ - if (idx < 0) - return &emptyconstraint; - /* * grab pre-allocated constraint entry */ -- 2.7.4